Andrew Newell
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A geophysicist who uses MATLAB for most of his modeling. Professional Interests: geophysics
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15 Questions
763 Answers
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MATLAB Central Community 20 Year Anniversary Treasure Hunt participant badge
Awarded to Andrew Newell on 16 Sep 2021
15-year anniversary Scavenger Hunt finisher badge
Awarded to Andrew Newell on 09 Nov 2016
Contribute at least one answer each month for 6 consecutive months
Awarded to Andrew Newell on 20 Jul 2017
Accept 5 answers given by other contributors
Awarded to Andrew Newell on 20 Jul 2017
Solve all the problems in Cody Challenge
Awarded to Andrew Newell on 23 Jul 2024
Receive 25 likes on a problem you have created
Awarded to Andrew Newell on 03 May 2024
Your submissions were downloaded 10 or more times in a month
Awarded to Andrew Newell on 01 May 2020
Your submission is selected as "Pick of The Week"
Awarded to Andrew Newell on 09 Oct 2019
Receive 10 likes on a problem you have created
Awarded to Andrew Newell on 16 May 2022
Solve all the problems in Sequences & Series I
Awarded to Andrew Newell on 17 Nov 2020
Solve all the problems in Matrix Manipulation I
Awarded to Andrew Newell on 09 Nov 2020
Solve Project Euler problems using Matlab
Awarded to Andrew Newell on 07 Nov 2020
Feeds
Using AND Operator in “if” statements
The problem is that size returns a vector: size([1 2 3]) ans = 1 3 Instead, use |numel|: if numel([1 2 3])==numel([4 5 6]) &...
15 hours ago | 9
| accepted
Solved
The Piggy Bank Problem
Given a cylindrical piggy bank with radius g and height y, return the bank's volume. [ g is first input argument.] Bonus though...
3 years ago
Solved
Lambert's W
Matlab cody does not support lambertw. Try to create a lambert's w function yourself. Lambert's W is the function that solves...
3 years ago
Solved
First use of arrayfun() and anonymous function @(x)
Create an anonymous function using @(x) for a parabola equation for the given coefficients stored in s with s(1)x2 + s(2)x +...
3 years ago
Solved
The End of the World
given a date -- represent it in the Maya long count system. <https://en.wikipedia.org/wiki/Maya_calendar> <https://maya.nm...
3 years ago
Solved
Lost days
Given two dates in a particular format, calculate the difference between them.
3 years ago
Solved
Leap Year
According to Gregorian Calender(which is in use now, in many countries),decide whether a given year is a leap year or not. Give...
3 years ago
Solved
Friday or not
I love Friday. Please tell me whether the day is Friday. Dateformat is 'yyyy-mm-dd' or 'dd-mmm-yyyy' or 'mm/dd/yyyy'. Exa...
3 years ago
Solved
Find the day for a date
Today's day and date will be given to you. By utilising that you need to find the day of the old date. (Date will be in DD/MM/YY...
3 years ago
Solved
Friday the 13th
According to superstition, lots of unpleasant stuff happens on Friday the 13th, so you might like to find the next occurence of ...
3 years ago
Solved
Day counter function
Write a function called _day_counter_ that returns the number of Mondays that fell on the first day of the month in a given year...
3 years ago
Solved
Count the days
Count the occurrence of a particular day (e.g. Monday) in a given year.
3 years ago
Solved
How long until the weekend?
Write a function a that takes a date vector as an input and returns the number of hours until the weekend begins. The beginning...
3 years ago
Solved
Days until next NewYear ball drop
Given a date string in the form 'yyyy-mm-dd' or 'yyyy-mm-dd hh:mm:ss', calculate the number of *days* until the dropping of the ...
3 years ago
How do I generate a random number with beta distribution?
You can use the function betarnd, but you'll need to do some normalizing to get it in the standard form used by MATLAB (see Beta...
3 years ago | 0
| accepted
Newton Raphson - saving all values and using last iteration value as initial for next
Sorry, I just realized that you wanted to save the iterations. Here's how: x = -0.001*ones(6,length(A1)); for i=1:5 x(i+1...
3 years ago | 0
| accepted
Newton Raphson - saving all values and using last iteration value as initial for next
O.k. So here is how you do it: x = -0.001*ones(size(A1)); for i=1:5 x = x - f(x)./fd(x); end
3 years ago | 0
Solved
Combinations without using nchoosek
You have to generate a matrix with all possible combinations of n elements *taken 2* at a time, *without using nchoosek(1:n,2)* ...
3 years ago
Solved
Rotate Matrix @180 degree
Rotate Matrix @180 degree Example A=[8 1 6; 3 5 7; 4 9 2], then answer would be [2 9 4;...
3 years ago
Solved
Calculate the average value of the elements in the array
Calculate the average value of the elements in the array
3 years ago
Solved
the average value of the elements
Calculate the average value of the elements in the array
3 years ago
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